ubuntuERROR

pip install pyyaml -> python2.xorpip3 install pyyaml ->python3.x

pip install empy -> python 2.xxpip3 install empy -> python 3.xx

When you met the error below this while cmake the 'flann' libraryCMake Error at src/cpp/CMakeLists.txt:33 (add_library): No SOURCES given to target:

If you met error like above picture, change the code in octomap_server_nodelet.cpp like below picture

gazebokillall gzserverkillall gzclientroscorekillall -9 roscorekillall -9 rosmaster

First, you need 'network-manager'sudo apt install network-managerSecond, edit the file /etc/NetworkManager/NetworkManager.conflike below picture, chan